Rugged chrome-vanadium steel construction Made from high-quality chrome-vanadium steel and heat-treated to boost toughness and reliability, this tool delivers consistent performance even in demanding work conditions. Rust-resistant durability The blackened exterior not only resists rust but also enhances the instrument’s appearance; it maintains its new look in damp environments to extend service life. Effortless locking handle Streamlines valve operation with an advanced molded locking handle that simplifies maintenance, reduces hand fatigue, and supports efficient, comfortable use. Advanced puller feet Thickened puller feet are produced using a one-piece molding process and high-temperature heat treatment to ensure superior strength and durability. Reinforced feet make installing or removing valve springs quick and efficient, enabling smooth operation and precise performance over extended use. Use scenarios - Automotive engine valve spring installation and removal, where reliable grip and precise control are essential. - Industrial equipment valve assemblies requiring durable tools that perform in challenging or moisture-prone environments. - HVAC system valve service where exacting valve spring handling and long-term durability are important.